I have used Norton for over a decade but now Comcast offers Comcast Internet customers Norton free. I have tried to email and call to stop the renewal emails but the continue. Does anybody knows how I can get them to stop?

I have used Norton for over a decade but now Comcast offers Comcast Internet customers Norton free. I have tried to email and call to stop the renewal emails but the continue. Does anybody knows how I can get them to stop?
